I've had lots of problems with Speedlite triggers on my 5D Mk4, but when I put the same trigger on my 5D Mk3 or 7D Mk2 everything works fine.

It's definitely not an issue with RF channel (frequency) settings or interference, because the other cameras trigger flawlessly in the same environment. It's something with the 5D Mk4 that's different.I know it's not the 5D Mk4 hotshoe, because an on-camera Speedlite works just fine, and so do my Paul C Buff triggers for my Einsteins.

When I use any of the above triggers with the 5D Mk4, it seems to trigger only every other time, and sometimes not even that. After the two ORLIT triggers failed me repeatedly, I purchased the Canon ST-E3-RT a month ago, hoping that it would be more reliable, but it failed completely on me last week. I also brought my 7D Mk2 along, and had to switch cameras to complete my shoot!

Oddly enough, the only consistent Speedlite triggering I can get with the 5D Mk4 is with the Yongnuo system. When I use the Yongnuo YN622C-TX transmitter and Younguo YN-622C receivers, it works every time!https://www.amazon.com …Transceiver/dp/​B00NW3KNZO

Am I the only one this is happening to? Is there a setting or something that I'm just missing?

Jared5 wrote in post #18582219I've had lots of problems with Speedlite triggers on my 5D Mk4, but when I put the same trigger on my 5D Mk3 or 7D Mk2 everything works fine.

It's definitely not an issue with RF channel (frequency) settings or interference, because the other cameras trigger flawlessly in the same environment. It's something with the 5D Mk4 that's different.I know it's not the 5D Mk4 hotshoe, because an on-camera Speedlite works just fine, and so do my Paul C Buff triggers for my Einsteins.

When I use any of the above triggers with the 5D Mk4, it seems to trigger only every other time, and sometimes not even that. After the two ORLIT triggers failed me repeatedly, I purchased the Canon ST-E3-RT a month ago, hoping that it would be more reliable, but it failed completely on me last week. I also brought my 7D Mk2 along, and had to switch cameras to complete my shoot!

Oddly enough, the only consistent Speedlite triggering I can get with the 5D Mk4 is with the Yongnuo system. When I use the Yongnuo YN622C-TX transmitter and Younguo YN-622C receivers, it works every time!https://www.amazon.com …Transceiver/dp/​B00NW3KNZO

Am I the only one this is happening to? Is there a setting or something that I'm just missing?

I bought the 5D4 and 1DXii... they are not compatible with the older Yongnuo transmitters. I bought a fairly new YNTX and it works just great.

There have been a lot of 3rd-party trigger incompatibilities with the newer Canon bodies from the 5DMkIV and 80D onwards, so apparently Canon modified the hotshoe protocol in a way that broke a lot of 3rd-party triggers (including PocketWizard's). Some required hardware fixes, some were fixed via firmware updates.

Jared5 wrote in post #18582219I've had lots of problems with Speedlite triggers on my 5D Mk4, but when I put the same trigger on my 5D Mk3 or 7D Mk2 everything works fine.

It's definitely not an issue with RF channel (frequency) settings or interference, because the other cameras trigger flawlessly in the same environment. It's something with the 5D Mk4 that's different.I know it's not the 5D Mk4 hotshoe, because an on-camera Speedlite works just fine, and so do my Paul C Buff triggers for my Einsteins.

When I use any of the above triggers with the 5D Mk4, it seems to trigger only every other time, and sometimes not even that. After the two ORLIT triggers failed me repeatedly, I purchased the Canon ST-E3-RT a month ago, hoping that it would be more reliable, but it failed completely on me last week. I also brought my 7D Mk2 along, and had to switch cameras to complete my shoot!

Oddly enough, the only consistent Speedlite triggering I can get with the 5D Mk4 is with the Yongnuo system. When I use the Yongnuo YN622C-TX transmitter and Younguo YN-622C receivers, it works every time!https://www.amazon.com …Transceiver/dp/​B00NW3KNZO

Am I the only one this is happening to? Is there a setting or something that I'm just missing?

Jared5.

When in doubt, contact Canon support or Canon CPS support if you are a member the old way, on the phone. Without seeing your camera in front of me, they can set up their inventory to match yours and see if they can replicate. It may be something simple that was moved in the menu's ( External Speedlite control maybe, maybe not). If that doesn't solve it, send it to Canon for service. Maybe the on camera hot shoe could need a cleaning at contact points, moisture or bumped. I would certainly call them today. I have been using the Canon system only now for six years with no problems. Let us know what they say. Thanks.

I'll give that a try. The funny thing is that I shot a wedding yesterday using two ORLIT TR-611C transmitters (on my 5D Mk3 and 5D Mk4), and they worked great!The problem is that I can never tell when they will work or not. Same thing with the Canon transmitter. The Yongnuo transmitters work every time, but I need to attach a receiver to each Speedlite, and would rather eliminate the extra bulk.

I checked batteries, gently checked the hotshoe connection, because I've had hotshoe problems in the past with my 5D Mk3 causing intermittent Speedlite connection. I sent the camera to CPS for repair and it worked great ever since (and I stopped mounting my GoPro to the hotshoe too).

When I tried to update the ORLIT TR-611C transmitter with the V2 firmware, it didn't take, and I'm still stuck on V001, but I'll keep trying.

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